Gauge device



R. T. RELF GAUGE DEVICE Sept. 26, 1950 Filed F'eb. 3, 1945 WL, M 0 T T A f Patented Sept. 26, 1950 GAUGE DEVICE Reginald T. Relf, Chatham, N. J., assignor to Federal Telephone and Radio Corporation, New York, N. Y., a corporation of Delaware Application February 3, 1945, Serial No. 576,055

8 Claims.

This invention relates to precision gauges such as are employed for testing the accuracy of the dimensional form of small and standardized parts to insure of lproper fit in commercial production.

A primary object of the invention is to provide a simple portable or hand tool type of testing gauge adapted for quickly and easily testing parts by the simple expedient of tilting of the gauging device to different positions. As a further feature it includes a design and arrangement operative by tilting in different directions for two dimensional gauging of the part or work piece without shifting of the latter from a retained position.

The aforesaid and other features and advantages of the present improvements will be more fully understood by reference to the accompanying drawings wherein like reference characters are applied to the corresponding parts in the different views.

In the drawings,

Fig. 1 is a view in side elevation of a gauging device embodying the features of the invention; and

Fig. 2 is a plan View thereof.

In the particular form of the improved gauging device as herein shown embodying the features of the invention, the device is specially designed for checking or measuring the angularity or squareness and likewise the milled length of magnet relay heel pieces such as are used in connection with automatic signal and telephone systems. The special use is illustrative of -many commercial instances wherein the accurate gauging or checking of similar articles is required to insure standardization of parts as to dimension or form within close tolerances. The gauging device is designed to include a quick action supporting and retaining means for rigidly securing the part in position for testing and a gauging means cooperatively related to the part so held and operative by a simple tilting and gravitational shifting of movable gauging members to quickly and accurately indicate the conformity or non-conformitv of the part to the dimensional requirements. The device is accordingly designed as a portable hand tool for gauging of the parts adapted to facilitate the testing by the mere tilting of the device first in one direction and then another.

In the preferred embodiment as illustrated the device consists of a, rectangular base I upon which is mounted or formed integral therewith an upwardly extending bearing member or anvil 2 formed with an inclined bearing surface 3 on its upper side and having its rearward end portion provided with a series of bores li drilled in its end and corresponding in position and spacing to the usual apertures 5 provided in the angular end portion 6 of the heel piece 1 to be tested. A quick release securing means is cooperatively associated with the bores for retaining the work consisting of a knurled iinger grip member 3 slidably fitted on a bearing shaft 9 supported in a bearing portion of the support I. The grip member 8 is urged forwardly by the coil springv I0 tted on the shaft 9 in position interposed between the bearing and the grip member. The grip member on its forward face is provided with a series of pins I I positioned to register with the apertures 5 of the heel piece and the bores 4 in alignment therewith. There is thus provided a quickly operable, yieldable, securing means effective rmly to vretain the part or Vheel piece in position for testing.

The gaugingY operation in the illustration as given has for its purpose first to determine if the heel piece is of proper angularity or squareness which is of importance in establishing that the core of the magnetic coil with which it is used is properly parallel to the heel piece at the armature or front end to insure that the armature engages the cores squarely so as to avoid magnetic diliiculties in the proper operation. For this test, a gravity operated testing roller I2 is provided and positioned to bear upon the inclined bearing surface 3 of the bearing member 2 and is retained in its operating position by means of oppositely positioned retaining :plates I 3-I3 secured to the side of the bearing member 2 and extending thereabove where they are formed with elongated retaining slots I4 to receive axial pin extensions I5 of the roller.

These slots are oppositely positioned and aligned to extend at an inclination parallel to the inclined bearing surface 3. The gravity testing roller I2 is ground to close dimension and desirably is of a diameter to engage the under surface of a heel piece of correct squareness or form at a position substantially midway of the length of the slot I4 (as shown in dotted lines at the right in the figures) whereby its centralized stop position upon, tilting of the tool in the clockwise direction will indicate a correct form of the angularity of the work piece. The .tool is positioned so that the angular bearing surface is tilted anti-clockwise from horizontal during the insertion or securing. of the heel piece in position as is readily understood. One of the retaining plates I3 may be provided with suitably In the example as shown.

this additional gravity testing means is em' ployed to gauge for correctness the milled length of the heel piece with a given degree of .tolerance. The structural arrangement therefor .2includes upwardly extending 'bearingportiens 1TB, l1 united with the base and an upper bearing member I8 secured by screws to Ythe portion "I'Ll The bearing members I and I8 are .provided- 'the test rollers 22 and 23 are retained within the slots |9-2i3 to be shiftable longitudinally 'thereof and to prevent tilting in the plane parallel to the elongated slot they are each provided with an annular collar or flange 24 slidab'ly received within a groove 25 in the member Il extending Ilongitudinally parallel to guide slots |9-20. The use of the annular anges on the rollers centrally positioned as shown permits of the Vrollers being of axial dimensions such as to have a looser fit thereby to be more freely shiftable without tendency to bind.

The inward bearing surface 26 ofthe support IT Yand the slots lll- 20 are straight and in 'parallel relation and are parallel to the A*milled end of the heel piece, the length 'of which is v'to be tested. Toi the end of 'testing for allowable lengths within a predetermined degree of tolerance, the rollers 22 and 23 are Vclosely ground to lbe 'of smaller and larger diameter respectively. The rearward roller 22 (Fig. 2) is of such diameter that it will roll or move between the relay heel piece and the surface 26 of the fixture when Vthe heel piece is of the allowable or correct length or shorter. yThis roller may accordingly be termed a GO rolle'r in that its passageby the end of the part under test indicates that the lpart is not of excessive length. Therforward roller 23, of larger diameter, is of such dimension that it will not roll Vbetween the end Yof the heel piece or part under test Vand the left hand end of the fixture if `the Yheelpiec'e is of vthe vcuorrect length but will roll betweenthese parts if the heel piece has been groundtoo short. It may accordingly from an-operational standpoint be referred to as a NO-GO roller. '.Ihe differ- :ence Lin the diameters of the .respective rollers as will -be appreciated vis proportionate .to Yan -allowable tolerance in the dimension of .the parts.' In'the testing Las to length by means 4of the gravity rollers 22, 23 the'work piece vis inserted with Athe device Atilted forwardly to position the rollers forwardly as shown -in Fig. Zand the gauging is performed upon then tilting of the fixture rearwardly so that 'the 'rollers tend If Von the other hand the testpart is too short the free passage of the roller will so indicate.

The improved gauging tool or xture asdescribed permits of conveniently and quickly inserting a work piece and retaining it in a secured position for two dimensional testing by simple manipulation ofthe tool to effect gravift'ational movement of the testing '.rollers. It thus combines in a single device' provision for Vgravity roller checking by movement of rollers fshiftable with relation to a fixed position of the jpart `:and with directions of movement in perpendicular relation thus to be non-interfering andpermitting'ofitilting of the device to a position where .all rollers assume a starting position with relation to the part and the testing operations "thereafter performed by tilting of the device clockwise and then rearwardly in the man-- ner readily understood.,Y

While there is shown a preferred embodiment of the invention, lit will be understood 'that various modifications 'may be :made therein without departing -romithe'scope-of the Vinvention as defined in the claims;

What is claimed is:

l. A gauge device Ycomprising 'a support, yieldfable securing means onthe support `fori-engaging a part to secureit intest position, a test roller slidably retained 4on the support and shiftable jby gravity fortest engagement with the part by tilting of the device and Ysaid support =being provided with a straight-'edge bearing angularly disposed Arelative -'to the surface of the part to Vbe tested and engaged by the test roller. A

2. A gauge 'device-'comprising a sup-port, means j'for detachably 'securing 1a lp'art 'thereto in a test position, Ya `straight :edge "bearingfon Ythe-support iin-angular rlationto'the lpart, bearing plates at opposite 'sides o'f fthe bearing and `provided with opposite elongated slots parallel to t le'bcaring, a test roller having axial pins/fitted to the slots `whereby the roller is re'ta-ined to lbe shiftable `lby gravity for test engagement with fthe parten tilting of the device.

3. A gauge devicefcompr'isingfafsupport, means to support a part thereon in-a test position, said support being provided Aa pair of elongated :bearing slots 'spaced relative toa surface of Ith'e part to be tested and atleast two 'test rollers having axial pins iitted'to 'theslots and shiftable therein by "gravity ffor test engagement with ythe part. A

4. A gauge Jdevice comprising Ia supporting member, means to support a part to be 'tested in a test position thereon, vroller testing elements slidably retained onY the lsupporting memberand to ybe shiftable by gravity for test lengagement with :the part with afrec't'ilinear path of movement, said roller elements 'being of dierent diameter, the 'smaller being y'of la size to clear the part unlessof 7excessive length and the other being of a size 'to bef'arrested vby engagement with the part `unless the latter is of deiicient length. z

5. A gauge devicf'as claimed in claim 4 'wherein the'roller elements are retained ywithinelongated bearing slotsfa'n'd futhercomprising means engagingfthe zrollers 4`tojprevent endwise tilting thereof.

6. A gauge device comprising a `supporting member, means detach-ably'securingja part to-be 'tested in a test lposition thereon, Y'said 'support being provide'dw'ith aligned elcngated bearing slots providing a guideway bearing spaced "with Y Lrelation -to the tpart under test, Lat least two tes't rollers having axial pins fitted to said slots and shiftable by gravity for test engagement with the part by tilting of the device, one of said rollers being of a diameter to clear the part unless of excessive length and the other of said rollers being of a diameter to be arrested in its movement by the fpart unless the latter is of deficient length.

7. A gauge device as claimed in claim 6 Wherein each of the rollers is provided centrally thereof with an annular collar and wherein the support is provided with a guide recess to receive said collar and extending parallel to the path of roller movement.

8. A gauge device according to claim 1, wherein the straight edge of said support is disposed at an acute angle to the surface of the part to be tested.

REGINALD T. RELF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

